﻿<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>word-wrap</title>
<link rel="stylesheet" href="demo.css"/>
<style type="text/css">
body{margin: 0;}
.m-demo{
	width:100%;/* ie6/7 */
	color:#000;
	background:#ddd;
	text-shadow:1px 1px #000;
	font:20px/3 arial "microsoft yahei";
	overflow:hidden;
	white-space:nowrap;
	text-overflow:ellipsis;
	text-indent:2em;
}
.m-demo em{font-weight:bold;}
.m-demo sup{vertical-align:super;font-size:12px;}
.m-demo del{text-decoration:line-through;}
</style>
</head>
<body>
<div class="m-demo">
方程：<em>x<sup>2</sup>+y<sup>2</sup>=128</em>，求x、y的值，请写出解题过程<del>请写出解题过程</del>
</div>
</body>
</html>